//编写代码, 基于 Callable 实现 1+2+3+...+1000
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;

public class Thread1 {
    public static void main(String[] args) throws ExecutionException, InterruptedException {
        Callable<Integer> callable = new  Callable<Integer>(){

            @Override
            public Integer call() throws Exception {
                int sum =0;
                for (int i = 1; i < 1001; i++) {
                    sum += i;
                }
                return  sum;
            }
        };
        FutureTask<Integer> futuretask = new FutureTask<>(callable);
        Thread t = new Thread(futuretask);
        t.start();
        System.out.println(futuretask.get());
    }
}
